Steam-dome and breeching



PATENTED SEPT. 20, 1904.

C. A. HUFFMASTER.

STEAM DOME AND BREEGHIN'G.

APPLICATION FILED DEC. 31, 1903.

NO MODEL.

nventox M Witness es:-

C%M/nm/ UNITED STATES.

Patented September 20, 1904.

PATENT OFFICE.

STEAM- DOME AND BREECHING.

SPECIFICATION forming part of Letters Patent No. 770,465, datedSeptember 20, 1904.

Application filed December 31, 1903. Serial No. 187,258. (No model.)

To all whmn it may concern.-

Be it known that I, GHARLEs A. HUFFMAS- TER, a citizen of the UnitedStates, residing at San Leandro, in the county of Alameda and State ofCalifornia, have invented new and useful Improvements in Steam-Domes andBreechings, of which the following is a specification.

My invention relates to improvements in steam-boilers.

It consists especially in the novel arrangement of the steam-dome and aninternallydisposed breeching and connections whereby the hot products ofcombustion after passing through the boiler-fines are carried throughthe breeching to the stack, so as to heat the steam contained within thedome, while the effect of the surrounding steam is to prevent theburning out of the breeching.

My invention also comprises a means for diverting the upwardly movinggases and throwing them more directly against the interior surface ofthe breeching before said gases escape from the stack, and it alsocomprises details of construction, which will be more fully explained byreference to the accompanying drawings, in which Figure 1 is anelevation and partial section of a vertical flue-boiler, showing myinvention. Fig. 2 shows the application to an inclined water-tubeboiler. Fig. 3 is a section of the exhaust-pipe joint.

It is the object of my invention to more thoroughly economize the hotproducts as they escape from the furnace through the boilertubes and tothe chimney or smoke-stack, and I effect it by the formation of apeculiarlyshaped breeching within the steam-dome and by bringing the hotproducts of combustion into contact with the breeching in such a manneras to superheat the steam inclosed in the surrounding dome.

In the accompanying drawings, A represents a boiler having a furnace ofany suitable description and flues or tubes through which the productsof combustion pass and by which the water surrounding these tubes isheated.

I have here illustrated my invention as applied to a vertical or uprightboiler having the tubes 2, and above the top of that portion of theboiler occupied by the tubes I have shown a dome, as at 3. This domereceives the steam, and from it the steam is drawn for such uses as maybe required. Within the dome is a conical breeching, as at 4;, havingits base or largest portion bolted or otherwise secured around the lowerpart of the dome and converging thence upwardly to a point where itconnects with a smoke-stack, as at 4:. This construction leaves a space5 surrounding the conical breeching, and this space receives the steamgenerated in the main portion of the boiler, the steam being transmittedinto this dome by means of a pipe or pipes, as at 6. The products ofcombustion passing through the tubes in the boiler and upwardly throughthe breeching converge toward the smoke-stack, and at the same timethese hot proolu cts impinge againstthe side of the breeching, thusimparting their heat to the steam within the dome,superheating it. Atthe same time the effect of this surrounding steam will be to preventthe breeching from being so highly heated as to burn out or bedestroyed. In order to more fully efiect the object desired, I haveshown a cone 7 located near the apex of the conical breeching andproperly supported by rods or stays, as at 8. The cone convergesdownwardly, having its mouth presented toward the chimney, and this conewill divert the rising products of combustion and insure their strikingagainst the interior of the breeching before they escape through thechimney, as they will afterward do by reason of their lightness. Thesteam-space of the dome may have a suitable pipe connection, as at 10,with a union 11, so that it can be disconnected at will, and the domeand breeching may be removed whenever it is necessary to reach the heador flue sheet of the main portion of the boiler.

The exhaust-pipe 12 from the engine enters the smoke-stack, and itsdischarge therein assists the draft. The smoke-stack is hinged at 13, soas to. be turned down toward a horizontal position when desired, andsegments are cut out of the side at the bottom and in the correspondingmeeting edge to admit the exhaust-pipe, and this allows the stack to beopened or closed Without disturbing the exhaust-pipe.

If it is desired to remove the dome and breeching, it will be necessaryto turn the exhaust-pipe out of the way, and this is effected by meansof a joint, as shown at 14:, which While turnable is also steam-tight.

I have heretofore described my invention as applied to upright boilerswith heat-fines passing through the water-space of the boiler; but itwill be manifest that it is equally applicable to what are known aswater-tube boilers. Fig. 2 shows the application to boiler of thatclass.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is v 1. The combination with a boiler, its furnace,and the fiues passing therethrough, of a dome located above the fines, aconical interior wall or breeching having its base or largest portionsecured directly around the lower part of. the dome said breechingforming an exterior closed steam-space within the dome, said breechinghaving its upper end extending through the dome and securedapproximately at the point where the dome is connected with thesmoke-stack, so that the escaping products of combustion impinge againstthe breeching before escaping from the stack.

2. The combination with a boiler having a heating-furnace, of a steamdome or extension located above the tubes, a conical breeching fixedabove the tubes convergent toward the center and connected with asmoke-stack, said breeching forming an annular steam-chamber betweenitself and the outer wall of the dome, and an inverted cone fixedapproximately at the junction of the breeching with the smokestack.

3. The combination with aboiler and its furnace, of a removable steamdome located above the tubes, a convergent conical breeching fixedwithin the steam-dome and forming therewith an annular steam-spaceexterior to itself, connections between the main boiler and saidsteam-space, an inverted cone fixed at the junction of the breeching andthe smokestack and removable jointed conducting-pipes connecting withthe steam-space of the dome.

In testimony whereofI have hereunto set my hand in presence of twosubscribing witnesses.

CHARLES A. HUFFMASTER.

Witnesses:

H. R. GRAY, A. B. THOMAS.

